Roof drain



FIG. 1 is a perspective view of a roof drain showing my new design;

FIG. 2 is a front elevation view of the design shown in FIG. 1, a rear elevation view being a mirror image;

FIG. 3 is a top plan view of the design shown in FIG. 1;

FIG. 4 is a left side view of the design shown in FIG. 1, a right side view being a mirror image; and,

FIG. 5 is a bottom plan view of the design shown in FIG. 1. 

CLAIM The ornamental design for a roof drain, as shown and described. 